Hystrichosphaeridium longispinosum
"longispinosum" Eisenack, 1931, p.110–111, pl.5, figs.6–17 ex Eisenack, 1938a, p.12–14. Holotype: Eisenack, 1931, pl.5, fig.10, as Ovum hispidum subsp. longispinosum, lost according to Eisenack (1959, p.194). Neotype: Eisenack, 1959, pl.15, fig.1, designated by Eisenack (1959, p.194). NOW Baltisphaeridium longispinosum (Appendix A). Originally Ovum hispidum subsp. longispinosum (name not validly published; Appendix A), subsequently Hystrichosphaera longispinosa (name not validly published), thirdly Hystrichosphaeridium longispinosum, fourthly (and now) Baltisphaeridium longispinosum (Appendix A), fifthly Micrhystridium longispinosum (combination not validly published; Appendix A). The name Ovum hispidum subsp. longispinosum was not validly published in Eisenack (1931) since the species name Ovum hispidum was not validly published. Age: Ordovician (erratic).
Parent: Hystrichosphaeridium
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